src/vnet/interface.c

   1 /*
   2  * Copyright (c) 2015 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 /*
  16  * interface.c: VNET interfaces/sub-interfaces
  17  *
  18  * Copyright (c) 2008 Eliot Dresselhaus
  19  *
  20  * Permission is hereby granted, free of charge, to any person obtaining
  21  * a copy of this software and associated documentation files (the
  22  * "Software"), to deal in the Software without restriction, including
  23  * without limitation the rights to use, copy, modify, merge, publish,
  24  * distribute, sublicense, and/or sell copies of the Software, and to
  25  * permit persons to whom the Software is furnished to do so, subject to
  26  * the following conditions:
  27  *
  28  * The above copyright notice and this permission notice shall be
  29  * included in all copies or substantial portions of the Software.
  30  *
  31  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  32  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  33  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  34  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  35  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  36  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  37  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  38  */
  39
  40 #include <vnet/vnet.h>
  41 #include <vnet/plugin/plugin.h>
  42 #include <vnet/fib/ip6_fib.h>
  43 #include <vnet/adj/adj.h>
  44 #include <vnet/adj/adj_mcast.h>
  45 #include <vnet/l2/l2_input.h>
  46
  47 typedef enum vnet_interface_helper_flags_t_
  48 {
  49   VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE = (1 << 0),
  50   VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE = (1 << 1),
  51 } vnet_interface_helper_flags_t;
  52
  53 static clib_error_t *vnet_hw_interface_set_flags_helper (vnet_main_t * vnm,
  54                                                          u32 hw_if_index,
  55                                                          vnet_hw_interface_flags_t
  56                                                          flags,
  57                                                          vnet_interface_helper_flags_t
  58                                                          helper_flags);
  59
  60 static clib_error_t *vnet_sw_interface_set_flags_helper (vnet_main_t * vnm,
  61                                                          u32 sw_if_index,
  62                                                          vnet_sw_interface_flags_t
  63                                                          flags,
  64                                                          vnet_interface_helper_flags_t
  65                                                          helper_flags);
  66
  67 static clib_error_t *vnet_hw_interface_set_class_helper (vnet_main_t * vnm,
  68                                                          u32 hw_if_index,
  69                                                          u32 hw_class_index,
  70                                                          u32 redistribute);
  71
  72 typedef struct
  73 {
  74   /* Either sw or hw interface index. */
  75   u32 sw_hw_if_index;
  76
  77   /* Flags. */
  78   u32 flags;
  79 } vnet_sw_hw_interface_state_t;
  80
  81 static void
  82 serialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m, va_list * va)
  83 {
  84   vnet_sw_hw_interface_state_t *s =
  85     va_arg (*va, vnet_sw_hw_interface_state_t *);
  86   u32 n = va_arg (*va, u32);
  87   u32 i;
  88   for (i = 0; i < n; i++)
  89     {
  90       serialize_integer (m, s[i].sw_hw_if_index,
  91                          sizeof (s[i].sw_hw_if_index));
  92       serialize_integer (m, s[i].flags, sizeof (s[i].flags));
  93     }
  94 }
  95
  96 static void
  97 unserialize_vec_vnet_sw_hw_interface_state (serialize_main_t * m,
  98                                             va_list * va)
  99 {
 100   vnet_sw_hw_interface_state_t *s =
 101     va_arg (*va, vnet_sw_hw_interface_state_t *);
 102   u32 n = va_arg (*va, u32);
 103   u32 i;
 104   for (i = 0; i < n; i++)
 105     {
 106       unserialize_integer (m, &s[i].sw_hw_if_index,
 107                            sizeof (s[i].sw_hw_if_index));
 108       unserialize_integer (m, &s[i].flags, sizeof (s[i].flags));
 109     }
 110 }
 111
 112 static vnet_sw_interface_flags_t
 113 vnet_hw_interface_flags_to_sw (vnet_hw_interface_flags_t hwf)
 114 {
 115   vnet_sw_interface_flags_t swf = VNET_SW_INTERFACE_FLAG_NONE;
 116
 117   if (hwf & VNET_HW_INTERFACE_FLAG_LINK_UP)
 118     swf |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 119
 120   return (swf);
 121 }
 122
 123 void
 124 serialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 125 {
 126   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 127   vnet_sw_hw_interface_state_t *sts = 0, *st;
 128   vnet_sw_interface_t *sif;
 129   vnet_hw_interface_t *hif;
 130   vnet_interface_main_t *im = &vnm->interface_main;
 131
 132   /* Serialize hardware interface classes since they may have changed.
 133      Must do this before sending up/down flags. */
 134   /* *INDENT-OFF* */
 135   pool_foreach (hif, im->hw_interfaces, ({
 136     vnet_hw_interface_class_t * hw_class = vnet_get_hw_interface_class (vnm, hif->hw_class_index);
 137     serialize_cstring (m, hw_class->name);
 138   }));
 139   /* *INDENT-ON* */
 140
 141   /* Send sw/hw interface state when non-zero. */
 142   /* *INDENT-OFF* */
 143   pool_foreach (sif, im->sw_interfaces, ({
 144     if (sif->flags != 0)
 145       {
 146         vec_add2 (sts, st, 1);
 147         st->sw_hw_if_index = sif->sw_if_index;
 148         st->flags = sif->flags;
 149       }
 150   }));
 151   /* *INDENT-ON* */
 152
 153   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 154
 155   if (sts)
 156     _vec_len (sts) = 0;
 157
 158   /* *INDENT-OFF* */
 159   pool_foreach (hif, im->hw_interfaces, ({
 160     if (hif->flags != 0)
 161       {
 162         vec_add2 (sts, st, 1);
 163         st->sw_hw_if_index = hif->hw_if_index;
 164         st->flags = vnet_hw_interface_flags_to_sw(hif->flags);
 165       }
 166   }));
 167   /* *INDENT-ON* */
 168
 169   vec_serialize (m, sts, serialize_vec_vnet_sw_hw_interface_state);
 170
 171   vec_free (sts);
 172 }
 173
 174 static vnet_hw_interface_flags_t
 175 vnet_sw_interface_flags_to_hw (vnet_sw_interface_flags_t swf)
 176 {
 177   vnet_hw_interface_flags_t hwf = VNET_HW_INTERFACE_FLAG_NONE;
 178
 179   if (swf & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 180     hwf |= VNET_HW_INTERFACE_FLAG_LINK_UP;
 181
 182   return (hwf);
 183 }
 184
 185 void
 186 unserialize_vnet_interface_state (serialize_main_t * m, va_list * va)
 187 {
 188   vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
 189   vnet_sw_hw_interface_state_t *sts = 0, *st;
 190
 191   /* First set interface hardware class. */
 192   {
 193     vnet_interface_main_t *im = &vnm->interface_main;
 194     vnet_hw_interface_t *hif;
 195     char *class_name;
 196     uword *p;
 197     clib_error_t *error;
 198
 199     /* *INDENT-OFF* */
 200     pool_foreach (hif, im->hw_interfaces, ({
 201       unserialize_cstring (m, &class_name);
 202       p = hash_get_mem (im->hw_interface_class_by_name, class_name);
 203       ASSERT (p != 0);
 204       error = vnet_hw_interface_set_class_helper (vnm, hif->hw_if_index, p[0], /* redistribute */ 0);
 205       if (error)
 206         clib_error_report (error);
 207       vec_free (class_name);
 208     }));
 209     /* *INDENT-ON* */
 210   }
 211
 212   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 213   vec_foreach (st, sts)
 214     vnet_sw_interface_set_flags_helper (vnm, st->sw_hw_if_index, st->flags,
 215                                         /* no distribute */ 0);
 216   vec_free (sts);
 217
 218   vec_unserialize (m, &sts, unserialize_vec_vnet_sw_hw_interface_state);
 219   vec_foreach (st, sts)
 220   {
 221     vnet_hw_interface_set_flags_helper
 222       (vnm, st->sw_hw_if_index, vnet_sw_interface_flags_to_hw (st->flags),
 223        /* no distribute */ 0);
 224   }
 225   vec_free (sts);
 226 }
 227
 228 static clib_error_t *
 229 call_elf_section_interface_callbacks (vnet_main_t * vnm, u32 if_index,
 230                                       u32 flags,
 231                                       _vnet_interface_function_list_elt_t **
 232                                       elts)
 233 {
 234   _vnet_interface_function_list_elt_t *elt;
 235   vnet_interface_function_priority_t prio;
 236   clib_error_t *error = 0;
 237
 238   for (prio = VNET_ITF_FUNC_PRIORITY_LOW;
 239        prio <= VNET_ITF_FUNC_PRIORITY_HIGH; prio++)
 240     {
 241       elt = elts[prio];
 242
 243       while (elt)
 244         {
 245           error = elt->fp (vnm, if_index, flags);
 246           if (error)
 247             return error;
 248           elt = elt->next_interface_function;
 249         }
 250     }
 251   return error;
 252 }
 253
 254 static clib_error_t *
 255 call_hw_interface_add_del_callbacks (vnet_main_t * vnm, u32 hw_if_index,
 256                                      u32 is_create)
 257 {
 258   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 259   vnet_hw_interface_class_t *hw_class =
 260     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 261   vnet_device_class_t *dev_class =
 262     vnet_get_device_class (vnm, hi->dev_class_index);
 263   clib_error_t *error = 0;
 264
 265   if (hw_class->interface_add_del_function
 266       && (error =
 267           hw_class->interface_add_del_function (vnm, hw_if_index, is_create)))
 268     return error;
 269
 270   if (dev_class->interface_add_del_function
 271       && (error =
 272           dev_class->interface_add_del_function (vnm, hw_if_index,
 273                                                  is_create)))
 274     return error;
 275
 276   error = call_elf_section_interface_callbacks
 277     (vnm, hw_if_index, is_create, vnm->hw_interface_add_del_functions);
 278
 279   return error;
 280 }
 281
 282 static clib_error_t *
 283 call_sw_interface_add_del_callbacks (vnet_main_t * vnm, u32 sw_if_index,
 284                                      u32 is_create)
 285 {
 286   return call_elf_section_interface_callbacks
 287     (vnm, sw_if_index, is_create, vnm->sw_interface_add_del_functions);
 288 }
 289
 290 static clib_error_t *
 291 vnet_hw_interface_set_flags_helper (vnet_main_t * vnm, u32 hw_if_index,
 292                                     vnet_hw_interface_flags_t flags,
 293                                     vnet_interface_helper_flags_t
 294                                     helper_flags)
 295 {
 296   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 297   vnet_hw_interface_class_t *hw_class =
 298     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 299   u32 mask;
 300   clib_error_t *error = 0;
 301   u32 is_create =
 302     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 303
 304   mask =
 305     (VNET_HW_INTERFACE_FLAG_LINK_UP | VNET_HW_INTERFACE_FLAG_DUPLEX_MASK);
 306   flags &= mask;
 307
 308   /* Call hardware interface add/del callbacks. */
 309   if (is_create)
 310     call_hw_interface_add_del_callbacks (vnm, hw_if_index, is_create);
 311
 312   /* Already in the desired state? */
 313   if (!is_create && (hi->flags & mask) == flags)
 314     goto done;
 315
 316   if ((hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) !=
 317       (flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 318     {
 319       /* Do hardware class (e.g. ethernet). */
 320       if (hw_class->link_up_down_function
 321           && (error = hw_class->link_up_down_function (vnm, hw_if_index,
 322                                                        flags)))
 323         goto done;
 324
 325       error = call_elf_section_interface_callbacks
 326         (vnm, hw_if_index, flags, vnm->hw_interface_link_up_down_functions);
 327
 328       if (error)
 329         goto done;
 330     }
 331
 332   hi->flags &= ~mask;
 333   hi->flags |= flags;
 334
 335 done:
 336   return error;
 337 }
 338
 339 static clib_error_t *
 340 vnet_sw_interface_set_flags_helper (vnet_main_t * vnm, u32 sw_if_index,
 341                                     vnet_sw_interface_flags_t flags,
 342                                     vnet_interface_helper_flags_t
 343                                     helper_flags)
 344 {
 345   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 346   u32 mask;
 347   clib_error_t *error = 0;
 348   u32 is_create =
 349     (helper_flags & VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE) != 0;
 350   u32 old_flags;
 351
 352   mask = VNET_SW_INTERFACE_FLAG_ADMIN_UP | VNET_SW_INTERFACE_FLAG_PUNT;
 353   flags &= mask;
 354
 355   if (is_create)
 356     {
 357       error =
 358         call_sw_interface_add_del_callbacks (vnm, sw_if_index, is_create);
 359       if (error)
 360         goto done;
 361
 362       if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 363         {
 364           /* Notify everyone when the interface is created as admin up */
 365           error = call_elf_section_interface_callbacks (vnm, sw_if_index,
 366                                                         flags,
 367                                                         vnm->
 368                                                         sw_interface_admin_up_down_functions);
 369           if (error)
 370             goto done;
 371         }
 372     }
 373   else
 374     {
 375       vnet_sw_interface_t *si_sup = si;
 376
 377       /* Check that super interface is in correct state. */
 378       if (si->type == VNET_SW_INTERFACE_TYPE_SUB)
 379         {
 380           si_sup = vnet_get_sw_interface (vnm, si->sup_sw_if_index);
 381
 382           /* Check to see if we're bringing down the soft interface and if it's parent is up */
 383           if ((flags != (si_sup->flags & mask)) &&
 384               (!((flags == 0)
 385                  && ((si_sup->flags & mask) ==
 386                      VNET_SW_INTERFACE_FLAG_ADMIN_UP))))
 387             {
 388               error = clib_error_return (0, "super-interface %U must be %U",
 389                                          format_vnet_sw_interface_name, vnm,
 390                                          si_sup,
 391                                          format_vnet_sw_interface_flags,
 392                                          flags);
 393               goto done;
 394             }
 395         }
 396
 397       /* Already in the desired state? */
 398       if ((si->flags & mask) == flags)
 399         goto done;
 400
 401       /* Sub-interfaces of hardware interfaces that do no redistribute,
 402          do not redistribute themselves. */
 403       if (si_sup->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 404         {
 405           vnet_hw_interface_t *hi =
 406             vnet_get_hw_interface (vnm, si_sup->hw_if_index);
 407           vnet_device_class_t *dev_class =
 408             vnet_get_device_class (vnm, hi->dev_class_index);
 409           if (!dev_class->redistribute)
 410             helper_flags &=
 411               ~VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE;
 412         }
 413
 414       /* set the flags now before invoking the registered clients
 415        * so that the state they query is consistent with the state here notified */
 416       old_flags = si->flags;
 417       si->flags &= ~mask;
 418       si->flags |= flags;
 419       if ((flags | old_flags) & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 420         error = call_elf_section_interface_callbacks
 421           (vnm, sw_if_index, flags,
 422            vnm->sw_interface_admin_up_down_functions);
 423
 424       if (error)
 425         {
 426           /* restore flags on error */
 427           si->flags = old_flags;
 428           goto done;
 429         }
 430
 431       if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 432         {
 433           vnet_hw_interface_t *hi =
 434             vnet_get_hw_interface (vnm, si->hw_if_index);
 435           vnet_hw_interface_class_t *hw_class =
 436             vnet_get_hw_interface_class (vnm, hi->hw_class_index);
 437           vnet_device_class_t *dev_class =
 438             vnet_get_device_class (vnm, hi->dev_class_index);
 439
 440           if ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) &&
 441               (si->flags & VNET_SW_INTERFACE_FLAG_ERROR))
 442             {
 443               error = clib_error_return (0, "Interface in the error state");
 444               goto done;
 445             }
 446
 447           /* save the si admin up flag */
 448           old_flags = si->flags;
 449
 450           /* update si admin up flag in advance if we are going admin down */
 451           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 452             si->flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 453
 454           if (dev_class->admin_up_down_function
 455               && (error = dev_class->admin_up_down_function (vnm,
 456                                                              si->hw_if_index,
 457                                                              flags)))
 458             {
 459               /* restore si admin up flag to it's original state on errors */
 460               si->flags = old_flags;
 461               goto done;
 462             }
 463
 464           if (hw_class->admin_up_down_function
 465               && (error = hw_class->admin_up_down_function (vnm,
 466                                                             si->hw_if_index,
 467                                                             flags)))
 468             {
 469               /* restore si admin up flag to it's original state on errors */
 470               si->flags = old_flags;
 471               goto done;
 472             }
 473
 474           /* Admin down implies link down. */
 475           if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 476               && (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
 477             vnet_hw_interface_set_flags_helper (vnm, si->hw_if_index,
 478                                                 hi->flags &
 479                                                 ~VNET_HW_INTERFACE_FLAG_LINK_UP,
 480                                                 helper_flags);
 481         }
 482     }
 483
 484   si->flags &= ~mask;
 485   si->flags |= flags;
 486
 487 done:
 488   return error;
 489 }
 490
 491 clib_error_t *
 492 vnet_hw_interface_set_flags (vnet_main_t * vnm, u32 hw_if_index,
 493                              vnet_hw_interface_flags_t flags)
 494 {
 495   return vnet_hw_interface_set_flags_helper
 496     (vnm, hw_if_index, flags,
 497      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 498 }
 499
 500 clib_error_t *
 501 vnet_sw_interface_set_flags (vnet_main_t * vnm, u32 sw_if_index,
 502                              vnet_sw_interface_flags_t flags)
 503 {
 504   return vnet_sw_interface_set_flags_helper
 505     (vnm, sw_if_index, flags,
 506      VNET_INTERFACE_SET_FLAGS_HELPER_WANT_REDISTRIBUTE);
 507 }
 508
 509 void
 510 vnet_sw_interface_admin_up (vnet_main_t * vnm, u32 sw_if_index)
 511 {
 512   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 513
 514   if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
 515     {
 516       flags |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
 517       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 518     }
 519 }
 520
 521 void
 522 vnet_sw_interface_admin_down (vnet_main_t * vnm, u32 sw_if_index)
 523 {
 524   u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
 525
 526   if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
 527     {
 528       flags &= ~(VNET_SW_INTERFACE_FLAG_ADMIN_UP);
 529       vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
 530     }
 531 }
 532
 533 static u32
 534 vnet_create_sw_interface_no_callbacks (vnet_main_t * vnm,
 535                                        vnet_sw_interface_t * template)
 536 {
 537   vnet_interface_main_t *im = &vnm->interface_main;
 538   vnet_sw_interface_t *sw;
 539   u32 sw_if_index;
 540
 541   pool_get (im->sw_interfaces, sw);
 542   sw_if_index = sw - im->sw_interfaces;
 543
 544   sw[0] = template[0];
 545
 546   sw->flags = 0;
 547   sw->sw_if_index = sw_if_index;
 548   if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
 549     sw->sup_sw_if_index = sw->sw_if_index;
 550
 551   /* Allocate counters for this interface. */
 552   {
 553     u32 i;
 554
 555     vnet_interface_counter_lock (im);
 556
 557     for (i = 0; i < vec_len (im->sw_if_counters); i++)
 558       {
 559         vlib_validate_simple_counter (&im->sw_if_counters[i], sw_if_index);
 560         vlib_zero_simple_counter (&im->sw_if_counters[i], sw_if_index);
 561       }
 562
 563     for (i = 0; i < vec_len (im->combined_sw_if_counters); i++)
 564       {
 565         vlib_validate_combined_counter (&im->combined_sw_if_counters[i],
 566                                         sw_if_index);
 567         vlib_zero_combined_counter (&im->combined_sw_if_counters[i],
 568                                     sw_if_index);
 569       }
 570
 571     vnet_interface_counter_unlock (im);
 572   }
 573
 574   return sw_if_index;
 575 }
 576
 577 clib_error_t *
 578 vnet_create_sw_interface (vnet_main_t * vnm, vnet_sw_interface_t * template,
 579                           u32 * sw_if_index)
 580 {
 581   clib_error_t *error;
 582   vnet_hw_interface_t *hi;
 583   vnet_device_class_t *dev_class;
 584
 585   hi = vnet_get_sup_hw_interface (vnm, template->sup_sw_if_index);
 586   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
 587
 588   if (template->type == VNET_SW_INTERFACE_TYPE_SUB &&
 589       dev_class->subif_add_del_function)
 590     {
 591       error = dev_class->subif_add_del_function (vnm, hi->hw_if_index,
 592                                                  (struct vnet_sw_interface_t
 593                                                   *) template, 1);
 594       if (error)
 595         return error;
 596     }
 597
 598   *sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, template);
 599   error = vnet_sw_interface_set_flags_helper
 600     (vnm, *sw_if_index, template->flags,
 601      VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 602
 603   if (error)
 604     {
 605       /* undo the work done by vnet_create_sw_interface_no_callbacks() */
 606       vnet_interface_main_t *im = &vnm->interface_main;
 607       vnet_sw_interface_t *sw =
 608         pool_elt_at_index (im->sw_interfaces, *sw_if_index);
 609       pool_put (im->sw_interfaces, sw);
 610     }
 611
 612   return error;
 613 }
 614
 615 void
 616 vnet_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index)
 617 {
 618   vnet_interface_main_t *im = &vnm->interface_main;
 619   vnet_sw_interface_t *sw =
 620     pool_elt_at_index (im->sw_interfaces, sw_if_index);
 621
 622   /* Check if the interface has config and is removed from L2 BD or XConnect */
 623   vlib_main_t *vm = vlib_get_main ();
 624   l2_input_config_t *config;
 625   if (sw_if_index < vec_len (l2input_main.configs))
 626     {
 627       config = vec_elt_at_index (l2input_main.configs, sw_if_index);
 628       if (config->xconnect)
 629         set_int_l2_mode (vm, vnm, MODE_L3, config->output_sw_if_index, 0,
 630                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 631       if (config->xconnect || config->bridge)
 632         set_int_l2_mode (vm, vnm, MODE_L3, sw_if_index, 0,
 633                          L2_BD_PORT_TYPE_NORMAL, 0, 0);
 634     }
 635   vnet_clear_sw_interface_tag (vnm, sw_if_index);
 636
 637   /* Bring down interface in case it is up. */
 638   if (sw->flags != 0)
 639     vnet_sw_interface_set_flags (vnm, sw_if_index, /* flags */ 0);
 640
 641   call_sw_interface_add_del_callbacks (vnm, sw_if_index, /* is_create */ 0);
 642
 643   pool_put (im->sw_interfaces, sw);
 644 }
 645
 646 static clib_error_t *
 647 call_sw_interface_mtu_change_callbacks (vnet_main_t * vnm, u32 sw_if_index)
 648 {
 649   return call_elf_section_interface_callbacks
 650     (vnm, sw_if_index, 0, vnm->sw_interface_mtu_change_functions);
 651 }
 652
 653 void
 654 vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu)
 655 {
 656   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 657
 658   if (si->mtu[VNET_MTU_L3] != mtu)
 659     {
 660       si->mtu[VNET_MTU_L3] = mtu;
 661       call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 662     }
 663 }
 664
 665 void
 666 vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
 667                                     u32 mtu[])
 668 {
 669   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 670   bool changed = false;
 671   int i;
 672
 673   for (i = 0; i < VNET_N_MTU; i++)
 674     {
 675       if (si->mtu[i] != mtu[i])
 676         {
 677           si->mtu[i] = mtu[i];
 678           changed = true;
 679         }
 680     }
 681   /* Notify interested parties */
 682   if (changed)
 683     call_sw_interface_mtu_change_callbacks (vnm, sw_if_index);
 684 }
 685
 686 void
 687 vnet_sw_interface_ip_directed_broadcast (vnet_main_t * vnm,
 688                                          u32 sw_if_index, u8 enable)
 689 {
 690   vnet_sw_interface_t *si;
 691
 692   si = vnet_get_sw_interface (vnm, sw_if_index);
 693
 694   if (enable)
 695     si->flags |= VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 696   else
 697     si->flags &= ~VNET_SW_INTERFACE_FLAG_DIRECTED_BCAST;
 698
 699   ip4_directed_broadcast (sw_if_index, enable);
 700 }
 701
 702 /*
 703  * Reflect a change in hardware MTU on protocol MTUs
 704  */
 705 static walk_rc_t
 706 sw_interface_walk_callback (vnet_main_t * vnm, u32 sw_if_index, void *ctx)
 707 {
 708   u32 *link_mtu = ctx;
 709   vnet_sw_interface_set_mtu (vnm, sw_if_index, *link_mtu);
 710   return WALK_CONTINUE;
 711 }
 712
 713 void
 714 vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu)
 715 {
 716   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
 717
 718   if (hi->max_packet_bytes != mtu)
 719     {
 720       hi->max_packet_bytes = mtu;
 721       ethernet_set_flags (vnm, hw_if_index, ETHERNET_INTERFACE_FLAG_MTU);
 722       vnet_hw_interface_walk_sw (vnm, hw_if_index, sw_interface_walk_callback,
 723                                  &mtu);
 724     }
 725 }
 726
 727 static void
 728 setup_tx_node (vlib_main_t * vm,
 729                u32 node_index, vnet_device_class_t * dev_class)
 730 {
 731   vlib_node_t *n = vlib_get_node (vm, node_index);
 732
 733   n->function = dev_class->tx_function;
 734   n->format_trace = dev_class->format_tx_trace;
 735
 736   vlib_register_errors (vm, node_index,
 737                         dev_class->tx_function_n_errors,
 738                         dev_class->tx_function_error_strings);
 739 }
 740
 741 static void
 742 setup_output_node (vlib_main_t * vm,
 743                    u32 node_index, vnet_hw_interface_class_t * hw_class)
 744 {
 745   vlib_node_t *n = vlib_get_node (vm, node_index);
 746   n->format_buffer = hw_class->format_header;
 747   n->unformat_buffer = hw_class->unformat_header;
 748 }
 749
 750 /* Register an interface instance. */
 751 u32
 752 vnet_register_interface (vnet_main_t * vnm,
 753                          u32 dev_class_index,
 754                          u32 dev_instance,
 755                          u32 hw_class_index, u32 hw_instance)
 756 {
 757   vnet_interface_main_t *im = &vnm->interface_main;
 758   vnet_hw_interface_t *hw;
 759   vnet_device_class_t *dev_class =
 760     vnet_get_device_class (vnm, dev_class_index);
 761   vnet_hw_interface_class_t *hw_class =
 762     vnet_get_hw_interface_class (vnm, hw_class_index);
 763   vlib_main_t *vm = vnm->vlib_main;
 764   vnet_feature_config_main_t *fcm;
 765   vnet_config_main_t *cm;
 766   u32 hw_index, i;
 767   char *tx_node_name = NULL, *output_node_name = NULL;
 768
 769   pool_get (im->hw_interfaces, hw);
 770   clib_memset (hw, 0, sizeof (*hw));
 771
 772   hw_index = hw - im->hw_interfaces;
 773   hw->hw_if_index = hw_index;
 774   hw->default_rx_mode = VNET_HW_INTERFACE_RX_MODE_POLLING;
 775
 776   if (dev_class->format_device_name)
 777     hw->name = format (0, "%U", dev_class->format_device_name, dev_instance);
 778   else if (hw_class->format_interface_name)
 779     hw->name = format (0, "%U", hw_class->format_interface_name,
 780                        dev_instance);
 781   else
 782     hw->name = format (0, "%s%x", hw_class->name, dev_instance);
 783
 784   if (!im->hw_interface_by_name)
 785     im->hw_interface_by_name = hash_create_vec ( /* size */ 0,
 786                                                 sizeof (hw->name[0]),
 787                                                 sizeof (uword));
 788
 789   hash_set_mem (im->hw_interface_by_name, hw->name, hw_index);
 790
 791   /* Make hardware interface point to software interface. */
 792   {
 793     vnet_sw_interface_t sw = {
 794       .type = VNET_SW_INTERFACE_TYPE_HARDWARE,
 795       .flood_class = VNET_FLOOD_CLASS_NORMAL,
 796       .hw_if_index = hw_index
 797     };
 798     hw->sw_if_index = vnet_create_sw_interface_no_callbacks (vnm, &sw);
 799   }
 800
 801   hw->dev_class_index = dev_class_index;
 802   hw->dev_instance = dev_instance;
 803   hw->hw_class_index = hw_class_index;
 804   hw->hw_instance = hw_instance;
 805
 806   hw->max_rate_bits_per_sec = 0;
 807   hw->min_packet_bytes = 0;
 808   vnet_sw_interface_set_mtu (vnm, hw->sw_if_index, 0);
 809
 810   if (dev_class->tx_function == 0)
 811     goto no_output_nodes;       /* No output/tx nodes to create */
 812
 813   tx_node_name = (char *) format (0, "%v-tx", hw->name);
 814   output_node_name = (char *) format (0, "%v-output", hw->name);
 815
 816   /* If we have previously deleted interface nodes, re-use them. */
 817   if (vec_len (im->deleted_hw_interface_nodes) > 0)
 818     {
 819       vnet_hw_interface_nodes_t *hn;
 820       vlib_node_t *node;
 821       vlib_node_runtime_t *nrt;
 822
 823       hn = vec_end (im->deleted_hw_interface_nodes) - 1;
 824
 825       hw->tx_node_index = hn->tx_node_index;
 826       hw->output_node_index = hn->output_node_index;
 827
 828       vlib_node_rename (vm, hw->tx_node_index, "%v", tx_node_name);
 829       vlib_node_rename (vm, hw->output_node_index, "%v", output_node_name);
 830
 831       /* *INDENT-OFF* */
 832       foreach_vlib_main ({
 833         vnet_interface_output_runtime_t *rt;
 834
 835         rt = vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
 836         ASSERT (rt->is_deleted == 1);
 837         rt->is_deleted = 0;
 838         rt->hw_if_index = hw_index;
 839         rt->sw_if_index = hw->sw_if_index;
 840         rt->dev_instance = hw->dev_instance;
 841
 842         rt = vlib_node_get_runtime_data (this_vlib_main, hw->tx_node_index);
 843         rt->hw_if_index = hw_index;
 844         rt->sw_if_index = hw->sw_if_index;
 845         rt->dev_instance = hw->dev_instance;
 846       });
 847       /* *INDENT-ON* */
 848
 849       /* The new class may differ from the old one.
 850        * Functions have to be updated. */
 851       node = vlib_get_node (vm, hw->output_node_index);
 852       node->function = vnet_interface_output_node;
 853       node->format_trace = format_vnet_interface_output_trace;
 854       /* *INDENT-OFF* */
 855       foreach_vlib_main ({
 856         nrt = vlib_node_get_runtime (this_vlib_main, hw->output_node_index);
 857         nrt->function = node->function;
 858       });
 859       /* *INDENT-ON* */
 860
 861       node = vlib_get_node (vm, hw->tx_node_index);
 862       node->function = dev_class->tx_function;
 863       node->format_trace = dev_class->format_tx_trace;
 864       /* *INDENT-OFF* */
 865       foreach_vlib_main ({
 866         nrt = vlib_node_get_runtime (this_vlib_main, hw->tx_node_index);
 867         nrt->function = node->function;
 868       });
 869       /* *INDENT-ON* */
 870
 871       _vec_len (im->deleted_hw_interface_nodes) -= 1;
 872     }
 873   else
 874     {
 875       vlib_node_registration_t r;
 876       vnet_interface_output_runtime_t rt = {
 877         .hw_if_index = hw_index,
 878         .sw_if_index = hw->sw_if_index,
 879         .dev_instance = hw->dev_instance,
 880         .is_deleted = 0,
 881       };
 882
 883       clib_memset (&r, 0, sizeof (r));
 884       r.type = VLIB_NODE_TYPE_INTERNAL;
 885       r.runtime_data = &rt;
 886       r.runtime_data_bytes = sizeof (rt);
 887       r.scalar_size = 0;
 888       r.vector_size = sizeof (u32);
 889
 890       r.flags = VLIB_NODE_FLAG_IS_OUTPUT;
 891       r.name = tx_node_name;
 892       r.function = dev_class->tx_function;
 893
 894       hw->tx_node_index = vlib_register_node (vm, &r);
 895
 896       vlib_node_add_named_next_with_slot (vm, hw->tx_node_index,
 897                                           "error-drop",
 898                                           VNET_INTERFACE_TX_NEXT_DROP);
 899
 900       r.flags = 0;
 901       r.name = output_node_name;
 902       r.function = vnet_interface_output_node;
 903       r.format_trace = format_vnet_interface_output_trace;
 904
 905       {
 906         static char *e[] = {
 907           "interface is down",
 908           "interface is deleted",
 909           "no buffers to segment GSO",
 910         };
 911
 912         r.n_errors = ARRAY_LEN (e);
 913         r.error_strings = e;
 914       }
 915       hw->output_node_index = vlib_register_node (vm, &r);
 916
 917       vlib_node_add_named_next_with_slot (vm, hw->output_node_index,
 918                                           "error-drop",
 919                                           VNET_INTERFACE_OUTPUT_NEXT_DROP);
 920       vlib_node_add_next_with_slot (vm, hw->output_node_index,
 921                                     hw->tx_node_index,
 922                                     VNET_INTERFACE_OUTPUT_NEXT_TX);
 923
 924       /* add interface to the list of "output-interface" feature arc start nodes
 925          and clone nexts from 1st interface if it exists */
 926       fcm = vnet_feature_get_config_main (im->output_feature_arc_index);
 927       cm = &fcm->config_main;
 928       i = vec_len (cm->start_node_indices);
 929       vec_validate (cm->start_node_indices, i);
 930       cm->start_node_indices[i] = hw->output_node_index;
 931       if (hw_index)
 932         {
 933           /* copy nexts from 1st interface */
 934           vnet_hw_interface_t *first_hw;
 935           vlib_node_t *first_node;
 936
 937           first_hw = vnet_get_hw_interface (vnm, /* hw_if_index */ 0);
 938           first_node = vlib_get_node (vm, first_hw->output_node_index);
 939
 940           /* 1st 2 nexts are already added above */
 941           for (i = 2; i < vec_len (first_node->next_nodes); i++)
 942             vlib_node_add_next_with_slot (vm, hw->output_node_index,
 943                                           first_node->next_nodes[i], i);
 944         }
 945     }
 946
 947   setup_output_node (vm, hw->output_node_index, hw_class);
 948   setup_tx_node (vm, hw->tx_node_index, dev_class);
 949
 950 no_output_nodes:
 951   /* Call all up/down callbacks with zero flags when interface is created. */
 952   vnet_sw_interface_set_flags_helper (vnm, hw->sw_if_index, /* flags */ 0,
 953                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 954   vnet_hw_interface_set_flags_helper (vnm, hw_index, /* flags */ 0,
 955                                       VNET_INTERFACE_SET_FLAGS_HELPER_IS_CREATE);
 956   vec_free (tx_node_name);
 957   vec_free (output_node_name);
 958
 959   return hw_index;
 960 }
 961
 962 void
 963 vnet_delete_hw_interface (vnet_main_t * vnm, u32 hw_if_index)
 964 {
 965   vnet_interface_main_t *im = &vnm->interface_main;
 966   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 967   vlib_main_t *vm = vnm->vlib_main;
 968   vnet_device_class_t *dev_class = vnet_get_device_class (vnm,
 969                                                           hw->dev_class_index);
 970   /* If it is up, mark it down. */
 971   if (hw->flags != 0)
 972     vnet_hw_interface_set_flags (vnm, hw_if_index, /* flags */ 0);
 973
 974   /* Call delete callbacks. */
 975   call_hw_interface_add_del_callbacks (vnm, hw_if_index, /* is_create */ 0);
 976
 977   /* Delete any sub-interfaces. */
 978   {
 979     u32 id, sw_if_index;
 980     /* *INDENT-OFF* */
 981     hash_foreach (id, sw_if_index, hw->sub_interface_sw_if_index_by_id,
 982     ({
 983       vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
 984       u64 sup_and_sub_key =
 985         ((u64) (si->sup_sw_if_index) << 32) | (u64) si->sub.id;
 986       hash_unset_mem_free (&im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
 987       vnet_delete_sw_interface (vnm, sw_if_index);
 988     }));
 989     hash_free (hw->sub_interface_sw_if_index_by_id);
 990     /* *INDENT-ON* */
 991   }
 992
 993   /* Delete software interface corresponding to hardware interface. */
 994   vnet_delete_sw_interface (vnm, hw->sw_if_index);
 995
 996   if (dev_class->tx_function)
 997     {
 998       /* Put output/tx nodes into recycle pool */
 999       vnet_hw_interface_nodes_t *dn;
1000
1001       /* *INDENT-OFF* */
1002       foreach_vlib_main
1003         ({
1004           vnet_interface_output_runtime_t *rt =
1005             vlib_node_get_runtime_data (this_vlib_main, hw->output_node_index);
1006
1007           /* Mark node runtime as deleted so output node (if called)
1008            * will drop packets. */
1009           rt->is_deleted = 1;
1010         });
1011       /* *INDENT-ON* */
1012
1013       vlib_node_rename (vm, hw->output_node_index,
1014                         "interface-%d-output-deleted", hw_if_index);
1015       vlib_node_rename (vm, hw->tx_node_index, "interface-%d-tx-deleted",
1016                         hw_if_index);
1017       vec_add2 (im->deleted_hw_interface_nodes, dn, 1);
1018       dn->tx_node_index = hw->tx_node_index;
1019       dn->output_node_index = hw->output_node_index;
1020     }
1021
1022   hash_unset_mem (im->hw_interface_by_name, hw->name);
1023   vec_free (hw->name);
1024   vec_free (hw->hw_address);
1025   vec_free (hw->input_node_thread_index_by_queue);
1026   vec_free (hw->dq_runtime_index_by_queue);
1027
1028   pool_put (im->hw_interfaces, hw);
1029 }
1030
1031 void
1032 vnet_hw_interface_walk_sw (vnet_main_t * vnm,
1033                            u32 hw_if_index,
1034                            vnet_hw_sw_interface_walk_t fn, void *ctx)
1035 {
1036   vnet_hw_interface_t *hi;
1037   u32 id, sw_if_index;
1038
1039   hi = vnet_get_hw_interface (vnm, hw_if_index);
1040   /* the super first, then the sub interfaces */
1041   if (WALK_STOP == fn (vnm, hi->sw_if_index, ctx))
1042     return;
1043
1044   /* *INDENT-OFF* */
1045   hash_foreach (id, sw_if_index,
1046                 hi->sub_interface_sw_if_index_by_id,
1047   ({
1048     if (WALK_STOP == fn (vnm, sw_if_index, ctx))
1049       break;
1050   }));
1051   /* *INDENT-ON* */
1052 }
1053
1054 void
1055 vnet_hw_interface_walk (vnet_main_t * vnm,
1056                         vnet_hw_interface_walk_t fn, void *ctx)
1057 {
1058   vnet_interface_main_t *im;
1059   vnet_hw_interface_t *hi;
1060
1061   im = &vnm->interface_main;
1062
1063   /* *INDENT-OFF* */
1064   pool_foreach (hi, im->hw_interfaces,
1065   ({
1066     if (WALK_STOP == fn(vnm, hi->hw_if_index, ctx))
1067       break;
1068   }));
1069   /* *INDENT-ON* */
1070 }
1071
1072 void
1073 vnet_sw_interface_walk (vnet_main_t * vnm,
1074                         vnet_sw_interface_walk_t fn, void *ctx)
1075 {
1076   vnet_interface_main_t *im;
1077   vnet_sw_interface_t *si;
1078
1079   im = &vnm->interface_main;
1080
1081   /* *INDENT-OFF* */
1082   pool_foreach (si, im->sw_interfaces,
1083   {
1084     if (WALK_STOP == fn (vnm, si, ctx))
1085       break;
1086   });
1087   /* *INDENT-ON* */
1088 }
1089
1090 void
1091 vnet_hw_interface_init_for_class (vnet_main_t * vnm, u32 hw_if_index,
1092                                   u32 hw_class_index, u32 hw_instance)
1093 {
1094   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1095   vnet_hw_interface_class_t *hc =
1096     vnet_get_hw_interface_class (vnm, hw_class_index);
1097
1098   hi->hw_class_index = hw_class_index;
1099   hi->hw_instance = hw_instance;
1100   setup_output_node (vnm->vlib_main, hi->output_node_index, hc);
1101 }
1102
1103 static clib_error_t *
1104 vnet_hw_interface_set_class_helper (vnet_main_t * vnm, u32 hw_if_index,
1105                                     u32 hw_class_index, u32 redistribute)
1106 {
1107   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1108   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, hi->sw_if_index);
1109   vnet_hw_interface_class_t *old_class =
1110     vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1111   vnet_hw_interface_class_t *new_class =
1112     vnet_get_hw_interface_class (vnm, hw_class_index);
1113   vnet_device_class_t *dev_class =
1114     vnet_get_device_class (vnm, hi->dev_class_index);
1115   clib_error_t *error = 0;
1116
1117   /* New class equals old class?  Nothing to do. */
1118   if (hi->hw_class_index == hw_class_index)
1119     return 0;
1120
1121   /* No need (and incorrect since admin up flag may be set) to do error checking when
1122      receiving unserialize message. */
1123   if (redistribute)
1124     {
1125       if (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
1126         return clib_error_return (0,
1127                                   "%v must be admin down to change class from %s to %s",
1128                                   hi->name, old_class->name, new_class->name);
1129
1130       /* Make sure interface supports given class. */
1131       if ((new_class->is_valid_class_for_interface
1132            && !new_class->is_valid_class_for_interface (vnm, hw_if_index,
1133                                                         hw_class_index))
1134           || (dev_class->is_valid_class_for_interface
1135               && !dev_class->is_valid_class_for_interface (vnm, hw_if_index,
1136                                                            hw_class_index)))
1137         return clib_error_return (0,
1138                                   "%v class cannot be changed from %s to %s",
1139                                   hi->name, old_class->name, new_class->name);
1140
1141     }
1142
1143   if (old_class->hw_class_change)
1144     old_class->hw_class_change (vnm, hw_if_index, old_class->index,
1145                                 new_class->index);
1146
1147   vnet_hw_interface_init_for_class (vnm, hw_if_index, new_class->index,
1148                                     /* instance */ ~0);
1149
1150   if (new_class->hw_class_change)
1151     new_class->hw_class_change (vnm, hw_if_index, old_class->index,
1152                                 new_class->index);
1153
1154   if (dev_class->hw_class_change)
1155     dev_class->hw_class_change (vnm, hw_if_index, new_class->index);
1156
1157   return error;
1158 }
1159
1160 clib_error_t *
1161 vnet_hw_interface_set_class (vnet_main_t * vnm, u32 hw_if_index,
1162                              u32 hw_class_index)
1163 {
1164   return vnet_hw_interface_set_class_helper (vnm, hw_if_index, hw_class_index,
1165                                              /* redistribute */ 1);
1166 }
1167
1168 static int
1169 vnet_hw_interface_rx_redirect_to_node_helper (vnet_main_t * vnm,
1170                                               u32 hw_if_index,
1171                                               u32 node_index,
1172                                               u32 redistribute)
1173 {
1174   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1175   vnet_device_class_t *dev_class = vnet_get_device_class
1176     (vnm, hi->dev_class_index);
1177
1178   if (dev_class->rx_redirect_to_node)
1179     {
1180       dev_class->rx_redirect_to_node (vnm, hw_if_index, node_index);
1181       return 0;
1182     }
1183
1184   return VNET_API_ERROR_UNIMPLEMENTED;
1185 }
1186
1187 int
1188 vnet_hw_interface_rx_redirect_to_node (vnet_main_t * vnm, u32 hw_if_index,
1189                                        u32 node_index)
1190 {
1191   return vnet_hw_interface_rx_redirect_to_node_helper (vnm, hw_if_index,
1192                                                        node_index,
1193                                                        1 /* redistribute */ );
1194 }
1195
1196 word
1197 vnet_sw_interface_compare (vnet_main_t * vnm,
1198                            uword sw_if_index0, uword sw_if_index1)
1199 {
1200   vnet_sw_interface_t *sup0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
1201   vnet_sw_interface_t *sup1 = vnet_get_sup_sw_interface (vnm, sw_if_index1);
1202   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, sup0->hw_if_index);
1203   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, sup1->hw_if_index);
1204
1205   if (h0 != h1)
1206     return vec_cmp (h0->name, h1->name);
1207   return (word) h0->hw_instance - (word) h1->hw_instance;
1208 }
1209
1210 word
1211 vnet_hw_interface_compare (vnet_main_t * vnm,
1212                            uword hw_if_index0, uword hw_if_index1)
1213 {
1214   vnet_hw_interface_t *h0 = vnet_get_hw_interface (vnm, hw_if_index0);
1215   vnet_hw_interface_t *h1 = vnet_get_hw_interface (vnm, hw_if_index1);
1216
1217   if (h0 != h1)
1218     return vec_cmp (h0->name, h1->name);
1219   return (word) h0->hw_instance - (word) h1->hw_instance;
1220 }
1221
1222 int
1223 vnet_sw_interface_is_p2p (vnet_main_t * vnm, u32 sw_if_index)
1224 {
1225   vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
1226   if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
1227       (si->type == VNET_SW_INTERFACE_TYPE_PIPE))
1228     return 1;
1229
1230   vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
1231   vnet_hw_interface_class_t *hc =
1232     vnet_get_hw_interface_class (vnm, hw->hw_class_index);
1233
1234   return (hc->flags & VNET_HW_INTERFACE_CLASS_FLAG_P2P);
1235 }
1236
1237 clib_error_t *
1238 vnet_interface_init (vlib_main_t * vm)
1239 {
1240   vnet_main_t *vnm = vnet_get_main ();
1241   vnet_interface_main_t *im = &vnm->interface_main;
1242   vlib_buffer_t *b = 0;
1243   vnet_buffer_opaque_t *o = 0;
1244   clib_error_t *error;
1245
1246   /*
1247    * Keep people from shooting themselves in the foot.
1248    */
1249   if (sizeof (b->opaque) != sizeof (vnet_buffer_opaque_t))
1250     {
1251 #define _(a) if (sizeof(o->a) > sizeof (o->unused))                     \
1252       clib_warning                                                      \
1253         ("FATAL: size of opaque union subtype %s is %d (max %d)",       \
1254          #a, sizeof(o->a), sizeof (o->unused));
1255       foreach_buffer_opaque_union_subtype;
1256 #undef _
1257
1258       return clib_error_return
1259         (0, "FATAL: size of vlib buffer opaque %d, size of vnet opaque %d",
1260          sizeof (b->opaque), sizeof (vnet_buffer_opaque_t));
1261     }
1262
1263   clib_spinlock_init (&im->sw_if_counter_lock);
1264   clib_spinlock_lock (&im->sw_if_counter_lock); /* should be no need */
1265
1266   vec_validate (im->sw_if_counters, VNET_N_SIMPLE_INTERFACE_COUNTER - 1);
1267 #define _(E,n,p)                                                        \
1268   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;             \
1269   im->sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1270   foreach_simple_interface_counter_name
1271 #undef _
1272     vec_validate (im->combined_sw_if_counters,
1273                   VNET_N_COMBINED_INTERFACE_COUNTER - 1);
1274 #define _(E,n,p)                                                        \
1275   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].name = #n;    \
1276   im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_##E].stat_segment_name = "/" #p "/" #n;
1277   foreach_combined_interface_counter_name
1278 #undef _
1279     clib_spinlock_unlock (&im->sw_if_counter_lock);
1280
1281   im->device_class_by_name = hash_create_string ( /* size */ 0,
1282                                                  sizeof (uword));
1283   {
1284     vnet_device_class_t *c;
1285
1286     c = vnm->device_class_registrations;
1287
1288     while (c)
1289       {
1290         c->index = vec_len (im->device_classes);
1291         hash_set_mem (im->device_class_by_name, c->name, c->index);
1292
1293         if (c->tx_fn_registrations)
1294           {
1295             vlib_node_fn_registration_t *fnr = c->tx_fn_registrations;
1296             int priority = -1;
1297
1298             /* to avoid confusion, please remove ".tx_function" statement
1299                from VNET_DEVICE_CLASS() if using function candidates */
1300             ASSERT (c->tx_function == 0);
1301
1302             while (fnr)
1303               {
1304                 if (fnr->priority > priority)
1305                   {
1306                     priority = fnr->priority;
1307                     c->tx_function = fnr->function;
1308                   }
1309                 fnr = fnr->next_registration;
1310               }
1311           }
1312
1313         vec_add1 (im->device_classes, c[0]);
1314         c = c->next_class_registration;
1315       }
1316   }
1317
1318   im->hw_interface_class_by_name = hash_create_string ( /* size */ 0,
1319                                                        sizeof (uword));
1320
1321   im->sw_if_index_by_sup_and_sub = hash_create_mem (0, sizeof (u64),
1322                                                     sizeof (uword));
1323   {
1324     vnet_hw_interface_class_t *c;
1325
1326     c = vnm->hw_interface_class_registrations;
1327
1328     while (c)
1329       {
1330         c->index = vec_len (im->hw_interface_classes);
1331         hash_set_mem (im->hw_interface_class_by_name, c->name, c->index);
1332
1333         if (NULL == c->build_rewrite)
1334           c->build_rewrite = default_build_rewrite;
1335         if (NULL == c->update_adjacency)
1336           c->update_adjacency = default_update_adjacency;
1337
1338         vec_add1 (im->hw_interface_classes, c[0]);
1339         c = c->next_class_registration;
1340       }
1341   }
1342
1343   im->gso_interface_count = 0;
1344   /* init per-thread data */
1345   vec_validate_aligned (im->per_thread_data, vlib_num_workers (),
1346                         CLIB_CACHE_LINE_BYTES);
1347
1348   if ((error = vlib_call_init_function (vm, vnet_interface_cli_init)))
1349     return error;
1350
1351   vnm->interface_tag_by_sw_if_index = hash_create (0, sizeof (uword));
1352
1353 #if VLIB_BUFFER_TRACE_TRAJECTORY > 0
1354   if ((error = vlib_call_init_function (vm, trajectory_trace_init)))
1355     return error;
1356 #endif
1357
1358   return 0;
1359 }
1360
1361 VLIB_INIT_FUNCTION (vnet_interface_init);
1362
1363 /* Kludge to renumber interface names [only!] */
1364 int
1365 vnet_interface_name_renumber (u32 sw_if_index, u32 new_show_dev_instance)
1366 {
1367   int rv;
1368   vnet_main_t *vnm = vnet_get_main ();
1369   vnet_interface_main_t *im = &vnm->interface_main;
1370   vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
1371
1372   vnet_device_class_t *dev_class = vnet_get_device_class
1373     (vnm, hi->dev_class_index);
1374
1375   if (dev_class->name_renumber == 0 || dev_class->format_device_name == 0)
1376     return VNET_API_ERROR_UNIMPLEMENTED;
1377
1378   rv = dev_class->name_renumber (hi, new_show_dev_instance);
1379
1380   if (rv)
1381     return rv;
1382
1383   hash_unset_mem (im->hw_interface_by_name, hi->name);
1384   vec_free (hi->name);
1385   /* Use the mapping we set up to call it Ishmael */
1386   hi->name = format (0, "%U", dev_class->format_device_name,
1387                      hi->dev_instance);
1388
1389   hash_set_mem (im->hw_interface_by_name, hi->name, hi->hw_if_index);
1390   return rv;
1391 }
1392
1393 clib_error_t *
1394 vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
1395 {
1396   vnet_interface_main_t *im = &vnm->interface_main;
1397   vlib_main_t *vm = vnm->vlib_main;
1398   vnet_hw_interface_t *hw;
1399   u8 *old_name;
1400   clib_error_t *error = 0;
1401
1402   hw = vnet_get_hw_interface (vnm, hw_if_index);
1403   if (!hw)
1404     {
1405       return clib_error_return (0,
1406                                 "unable to find hw interface for index %u",
1407                                 hw_if_index);
1408     }
1409
1410   old_name = hw->name;
1411
1412   /* set new hw->name */
1413   hw->name = format (0, "%s", new_name);
1414
1415   /* remove the old name to hw_if_index mapping and install the new one */
1416   hash_unset_mem (im->hw_interface_by_name, old_name);
1417   hash_set_mem (im->hw_interface_by_name, hw->name, hw_if_index);
1418
1419   /* rename tx/output nodes */
1420   vlib_node_rename (vm, hw->tx_node_index, "%v-tx", hw->name);
1421   vlib_node_rename (vm, hw->output_node_index, "%v-output", hw->name);
1422
1423   /* free the old name vector */
1424   vec_free (old_name);
1425
1426   return error;
1427 }
1428
1429 static clib_error_t *
1430 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
1431                                              u32 hw_if_index,
1432                                              const u8 * mac_address)
1433 {
1434   clib_error_t *error = 0;
1435   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1436
1437   if (hi->hw_address)
1438     {
1439       u8 *old_address = vec_dup (hi->hw_address);
1440       vnet_device_class_t *dev_class =
1441         vnet_get_device_class (vnm, hi->dev_class_index);
1442       if (dev_class->mac_addr_change_function)
1443         {
1444           error =
1445             dev_class->mac_addr_change_function (hi, old_address,
1446                                                  mac_address);
1447         }
1448       if (!error)
1449         {
1450           vnet_hw_interface_class_t *hw_class;
1451
1452           hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
1453
1454           if (NULL != hw_class->mac_addr_change_function)
1455             hw_class->mac_addr_change_function (hi, old_address, mac_address);
1456         }
1457       else
1458         {
1459           error =
1460             clib_error_return (0,
1461                                "MAC Address Change is not supported on this interface");
1462         }
1463       vec_free (old_address);
1464     }
1465   else
1466     {
1467       error =
1468         clib_error_return (0,
1469                            "mac address change is not supported for interface index %u",
1470                            hw_if_index);
1471     }
1472   return error;
1473 }
1474
1475 clib_error_t *
1476 vnet_hw_interface_change_mac_address (vnet_main_t * vnm, u32 hw_if_index,
1477                                       const u8 * mac_address)
1478 {
1479   return vnet_hw_interface_change_mac_address_helper
1480     (vnm, hw_if_index, mac_address);
1481 }
1482
1483 /* update the unnumbered state of an interface*/
1484 void
1485 vnet_sw_interface_update_unnumbered (u32 unnumbered_sw_if_index,
1486                                      u32 ip_sw_if_index, u8 enable)
1487 {
1488   vnet_main_t *vnm = vnet_get_main ();
1489   vnet_sw_interface_t *si;
1490   u32 was_unnum;
1491
1492   si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
1493   was_unnum = (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1494
1495   if (enable)
1496     {
1497       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
1498       si->unnumbered_sw_if_index = ip_sw_if_index;
1499
1500       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1501         [unnumbered_sw_if_index] =
1502         ip4_main.
1503         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1504       ip6_main.
1505         lookup_main.if_address_pool_index_by_sw_if_index
1506         [unnumbered_sw_if_index] =
1507         ip6_main.
1508         lookup_main.if_address_pool_index_by_sw_if_index[ip_sw_if_index];
1509     }
1510   else
1511     {
1512       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
1513       si->unnumbered_sw_if_index = (u32) ~ 0;
1514
1515       ip4_main.lookup_main.if_address_pool_index_by_sw_if_index
1516         [unnumbered_sw_if_index] = ~0;
1517       ip6_main.lookup_main.if_address_pool_index_by_sw_if_index
1518         [unnumbered_sw_if_index] = ~0;
1519     }
1520
1521   if (was_unnum != (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
1522     {
1523       ip4_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1524       ip6_sw_interface_enable_disable (unnumbered_sw_if_index, enable);
1525     }
1526 }
1527
1528 vnet_l3_packet_type_t
1529 vnet_link_to_l3_proto (vnet_link_t link)
1530 {
1531   switch (link)
1532     {
1533     case VNET_LINK_IP4:
1534       return (VNET_L3_PACKET_TYPE_IP4);
1535     case VNET_LINK_IP6:
1536       return (VNET_L3_PACKET_TYPE_IP6);
1537     case VNET_LINK_MPLS:
1538       return (VNET_L3_PACKET_TYPE_MPLS);
1539     case VNET_LINK_ARP:
1540       return (VNET_L3_PACKET_TYPE_ARP);
1541     case VNET_LINK_ETHERNET:
1542     case VNET_LINK_NSH:
1543       ASSERT (0);
1544       break;
1545     }
1546   ASSERT (0);
1547   return (0);
1548 }
1549
1550 vnet_mtu_t
1551 vnet_link_to_mtu (vnet_link_t link)
1552 {
1553   switch (link)
1554     {
1555     case VNET_LINK_IP4:
1556       return (VNET_MTU_IP4);
1557     case VNET_LINK_IP6:
1558       return (VNET_MTU_IP6);
1559     case VNET_LINK_MPLS:
1560       return (VNET_MTU_MPLS);
1561     default:
1562       return (VNET_MTU_L3);
1563     }
1564 }
1565
1566 u8 *
1567 default_build_rewrite (vnet_main_t * vnm,
1568                        u32 sw_if_index,
1569                        vnet_link_t link_type, const void *dst_address)
1570 {
1571   return (NULL);
1572 }
1573
1574 void
1575 default_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
1576 {
1577   ip_adjacency_t *adj;
1578
1579   adj = adj_get (ai);
1580
1581   switch (adj->lookup_next_index)
1582     {
1583     case IP_LOOKUP_NEXT_GLEAN:
1584       adj_glean_update_rewrite (ai);
1585       break;
1586     case IP_LOOKUP_NEXT_ARP:
1587     case IP_LOOKUP_NEXT_BCAST:
1588       /*
1589        * default rewrite in neighbour adj
1590        */
1591       adj_nbr_update_rewrite
1592         (ai,
1593          ADJ_NBR_REWRITE_FLAG_COMPLETE,
1594          vnet_build_rewrite_for_sw_interface (vnm,
1595                                               sw_if_index,
1596                                               adj_get_link_type (ai), NULL));
1597       break;
1598     case IP_LOOKUP_NEXT_MCAST:
1599       /*
1600        * mcast traffic also uses default rewrite string with no mcast
1601        * switch time updates.
1602        */
1603       adj_mcast_update_rewrite
1604         (ai,
1605          vnet_build_rewrite_for_sw_interface (vnm,
1606                                               sw_if_index,
1607                                               adj_get_link_type (ai),
1608                                               NULL), 0);
1609       break;
1610     case IP_LOOKUP_NEXT_DROP:
1611     case IP_LOOKUP_NEXT_PUNT:
1612     case IP_LOOKUP_NEXT_LOCAL:
1613     case IP_LOOKUP_NEXT_REWRITE:
1614     case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
1615     case IP_LOOKUP_NEXT_MIDCHAIN:
1616     case IP_LOOKUP_NEXT_ICMP_ERROR:
1617     case IP_LOOKUP_N_NEXT:
1618       ASSERT (0);
1619       break;
1620     }
1621 }
1622
1623 int collect_detailed_interface_stats_flag = 0;
1624
1625 void
1626 collect_detailed_interface_stats_flag_set (void)
1627 {
1628   collect_detailed_interface_stats_flag = 1;
1629 }
1630
1631 void
1632 collect_detailed_interface_stats_flag_clear (void)
1633 {
1634   collect_detailed_interface_stats_flag = 0;
1635 }
1636
1637 static clib_error_t *
1638 collect_detailed_interface_stats_cli (vlib_main_t * vm,
1639                                       unformat_input_t * input,
1640                                       vlib_cli_command_t * cmd)
1641 {
1642   unformat_input_t _line_input, *line_input = &_line_input;
1643   clib_error_t *error = NULL;
1644
1645   /* Get a line of input. */
1646   if (!unformat_user (input, unformat_line_input, line_input))
1647     return clib_error_return (0, "expected enable | disable");
1648
1649   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1650     {
1651       if (unformat (line_input, "enable") || unformat (line_input, "on"))
1652         collect_detailed_interface_stats_flag_set ();
1653       else if (unformat (line_input, "disable")
1654                || unformat (line_input, "off"))
1655         collect_detailed_interface_stats_flag_clear ();
1656       else
1657         {
1658           error = clib_error_return (0, "unknown input `%U'",
1659                                      format_unformat_error, line_input);
1660           goto done;
1661         }
1662     }
1663
1664 done:
1665   unformat_free (line_input);
1666   return error;
1667 }
1668
1669 /* *INDENT-OFF* */
1670 VLIB_CLI_COMMAND (collect_detailed_interface_stats_command, static) = {
1671   .path = "interface collect detailed-stats",
1672   .short_help = "interface collect detailed-stats <enable|disable>",
1673   .function = collect_detailed_interface_stats_cli,
1674 };
1675 /* *INDENT-ON* */
1676
1677 /*
1678  * fd.io coding-style-patch-verification: ON
1679  *
1680  * Local Variables:
1681  * eval: (c-set-style "gnu")
1682  * End:
1683  */